There's nothing stopping you from playing 3.5e, you could even go to Pathfinder 1e, which is close to the same...
In 5e 2024 your character becomes a Swiss army knife, unless you build very specifically for it, your character is less of a one-shot glass cannon. And where 3.5e was more of a stacking bonuses game, in 5e 2024 the stacking of bonuses is extremely limited by design. But on the flip side in 5e 2024 you have more combos that 'hook' into each other instead of combos stacking. In fighting game comparison, 3.5e you make a combo to do one massive blow, while in 5e 2024 you're more likely to be 'juggling' your opponent.
There are things I miss about 3.5e, but many things I'm not missing at all. Things I don't miss: The overwhelming amount of player facing content that people assumed was available to choose from, all the feats, the prestige classes, spells, etc. From a DMs perspective, it was overwhelming to plan for. And imbalanced enough that folks doing the min/maxing would be so far ahead of 'normal' players that the power discrepancy would be a problem. And designing challenging 'boss' battles was an absolute pain! With all the stacking bonuses and penalties, durations, effects, etc. I needed a computer program to keep track of everything with high level 3.5e combat, with 5e 2024 that seems less of a problem, but at this time our primary method of play is via VTT...
Things I do miss: More official monster options, more magic items, templates, building rules for NPCs (levels) and monsters. I understand why 5e went with the 3 attuned item limit and toned down the power of many items (in the bonuses department), but I sometimes still miss the magic item Christmas trees (players). 5e feels less fleshed out regarding rules for certain subsystems or has made very abstract simple rules which lack flavor imho.
But overall I still prefer 5e 2024 over 3.5e in the rules department, things like more monster and NPC options I can work around. And if some rules (like bastions) are a bit to abstract for my tastes, I will go to a level that's appropriate for the campaign and my players. I did learn something very important from 3.5e: My very first 5e campaign as a DM had one rule: Only options from the PHB, the DM will be the one who will introduce additional options, so don't expect all the options from further expansions to become available by default.